I'm using AdGuard and it covers pretty much everything and is very customizable, including the annoying "accept cookies" banners that we have in Europe.
The Electron app needs to run to set options or to force filters update, not the rest of the time. It's still an annoyance but it's better than nothing.
why does it work like this in macos? (meaning - it seems to be running an outside process to block ads, unlike in Chrome where the process is internal to the browser, is this correct?
as a windows user i was puzzled by this when installing adguard
It doesn't, the Adguard developers just chose to write their app in such a way that their main app (which is an Electron app) needs to be in the loop for everything.
Actually it's true - Adguard needs to run as a standalone process that lives in the menu bar in order to work properly with Safari. This permanent process does appear to be Electron based.
My guess is that it's engineered like this to simplify their code base(s) between their various free plugins and their paid "Adguard for Mac" and "Adguard for Windows" apps.